Home / 13,189.04-18,200.87-7,221.08

Finding the Fourth Proportional to 13,189.04, 18,200.87 and 7,221.08

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Solution

The fourth proportional to 13,189.04, 18,200.87 and 7,221.08 is: 9,965.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.04 : 18,200.87 = 7,221.08 : x
  2. Step 2: Convert to fraction form
    13,189.04/18,200.87 = 7,221.08/x
  3. Step 3: Cross multiply
    13,189.04x = 18,200.87 × 7,221.08
  4. Step 4: Simplify right side
    13,189.04x = 131,429,811.23
  5. Step 5: Solve for x
    x = 131,429,811.23/13,189.04
  6. Step 6: Final answer
    x = 9,965.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.